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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75b45ad7e8fd9b7863df3dbf58c824ea1ef099836c6485db4feb3259ba302f0b' 
  AND token = 'wNDhf1DmyQHJCyo5Wxb4C/4EbhUYsdQ8zCIBSX7e2fY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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