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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbace57f11f828cae462a96c04a5354a8420cf5bc581823bf28b1356f754607f' 
  AND token = 'LuWiQ9XZ3eWfZ+yBGGOaJH3oyvSUwTIj/bMoPM6GN44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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