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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64f4e44157a1ffc774d963697cb0af1055320e65e3262d20fecc4cd8e671fe56' 
  AND token = 'ILBJ2gY8PwUysVgdEGxL4pgp00S8pKE94wF0Rvt0ZIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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