Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '616f2d2a6e4a6b07a0469813263993899781e6e51fa7888fccd717cc5dc0bd94' 
  AND token = 'xeUiPSgRFYrmsie0iMo7CXGz2GvA1kdyCVZS7Ddnjbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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