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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9e06d3c87245c0ed44fe43c3dbd93824b809047c214e16f872f8a35b93c68b4' 
  AND token = '5TeHWtMwrr+nnzgX/UAF/bUNwizDng8XRYnQXm5V8wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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