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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'beb0bd38e2f1ac9d650eae9108f92d8cc16e7e3b2f5fa752a83f2c57bf45719d' 
  AND token = 'XAOBQp2i9zYu7oAj+8YehmQnhhpHU3fOpfgB5qlkIg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}