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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07f44f9e43a4faee9ae21fc1a3472cd150bc3f7176d69d0573cc02b93ee96f16' 
  AND token = 'olF3Zy48d4HZCo0BGFAlywaTi6erveoACsSmoAKAJoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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