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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65022040338982b760f2e3a4bcd553b76ccaedf69f35965aaf9865cbb2fc2ca3' 
  AND token = 'sqki6yL7399/NghNjyP6Bs1AE2KQ48YLv2Fj4QMXttk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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