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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eded01a8fd9acf08aee097595a8ed70edf37fda96e0aed283c0e82d540f8773c' 
  AND token = '8P9w4WuLplIh6jNB4hj/cm/DsAKeCpRepr7GHNFBT0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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