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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '040c9373b89ea5158c11909d9c7a7dfb3f256387137f1d3cdeb292b0a2aee0cc' 
  AND token = 'YDA7rJyDRkttyPiXEB/Gsj1lpbBsnKt9Cb7gbJ5gIas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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