Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd51b1d6de71e57079dfcaaba4aa5d5b6faa0a44412b54b3a60c4ab21cd16e4c' 
  AND token = 'PfWz271ZPlVJG4KZ2bQnk5mSdcuHpLKBJYf2knNcRkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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