Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7290fa5738ff6b718d59862d74489293091555606e62e9d909fb6c6768a1d78d' 
  AND token = 'mMCt8Au7JrXItXPMRIu8KHg1bMCCGpBPEuFwtwRb1RA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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