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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3622de55e61b48adad59c79851a852e959e998ba9cf5a67a56f8bb41232d9b58' 
  AND token = 'jlLNWjW9pMb0ScoPV0H6QqEqWeZubwz68ymadmAM49w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00094

JSON explain

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