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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '633cf1b65eae144f0bc4949bcb117a21c96027e0acace0a774781620f498c48e' 
  AND token = 'fc3BoJ/7+p5qf9qD1udRKi1xudAkSeB5oESc12pasrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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