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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa927f45ed16eb2e5bfaa415a5f9a0f3bdece8f4c6d88853e6a3f8f5d6cab1e7' 
  AND token = 'PyLwGFx2oyj3D6deC1Us87F3m6oY9Ip4RrZcSC4vZTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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