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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '601504bc1360bb8a0654e58bdc0bc7aa999b0983198f51a85edfb84586bbacf7' 
  AND token = 'YNtOLHGRfhW/Jvw81mJTdbnf8ciYQkhIZdWsgSP56SA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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