Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'baef13bfe0d4e7048c4e4ec0f3aec91a50b2f95fec3a77ae0910dc95a439c83a' 
  AND token = 'wFQylBNWCEgIlv4bAT1ixcMDivkFJJTnbdn0uS85WPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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