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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02ac5ee45fc05d4d7f302dd7ec69528198a45b2e64358b4a23c03fd1eb1782b9' 
  AND token = 'hLxLw3MOZUKIWEew06IMxSP8ajoOlMDX9SwSV1ToRKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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