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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecb666216f1baa8329ac381d5d205060a7ab1ec40d2494ba094f0227ad4ff20f' 
  AND token = 'Sa7EN+/Q0Fi35V0KP9XBxmreC9ybpcCiHmTrZ3YEt10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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