SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abfc98e856d8365c660588119afcec8c9d2cf26d70824197f2e47be17740cfc3' 
  AND token = 'nWKho7MGOgwGc1vsjJ6mkJW88Bxw3j6YQDmOD4yzX1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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