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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05b13b6db3a5ea90d5b71741f53da188681b7007a7e3767b684123791af1c681' 
  AND token = 'oDoFVw0YdQERy2j3S//lG5eWBizVoy0EDBCuxYzWv88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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