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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7a1182dccf5e3bb8949305fc337b6e16e84a32402c58a3806e5de069a77bdfd' 
  AND token = 'OZwK8dMv4q+EZC7Ixk6/E+wmKvM4kmNCYfhY35WhYKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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