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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc2217e2b046a6597916ef6fc5de386a79010a2eb711dd252360450841b7022f' 
  AND token = '/tv85wUOnI58Qj2Oo45PLL04qAR/TMsHcSSKIo9OvLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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