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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ead65b719d6c95499d7b72f283a019fe3ecddfed46c915384460b3ddd96dad79' 
  AND token = 'ijG2zgWCXYKGJtKkz08lpOU9P4orJdrXP7punq2I/is=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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