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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '997b0e6d9dcaf0185a9cdf9d311169690edbc95d2aba02a5bf2e226e44cee9a3' 
  AND token = 'lhVXHrrXv8V70ZOXEWgT+fcGYxYmPXbkA11pzlJH+m0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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