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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf7d0a8764d9011ad6415fc170f6b56f0e9f719db370f461a6286302ce91b28f' 
  AND token = 'mlsOW24blRrHtOCeRkeIIb0LK9llG8qD0YI9tKm8B2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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