Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a538d6ffb73cece55665942e6273127923d05509ae98d5afc7a98f19fa99f5a4' 
  AND token = 'f37qCGNr2TT1M2TCZiCOF6vrCyO1dR5e1yi5KQPT+aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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