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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2f6a4215938c9926deb64a3ac8b4467e4226ee8473a2f98f42167c95d8aaba7' 
  AND token = 'HcW4SsuF4Lts9S27g3O7Jhgd4THJtyCY2nmqyU5PDBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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