Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ded4b18e17c4ef24f2c24746c5361341186d836919088cc09de2085289690c8' 
  AND token = 'YQwgEOPAQGjpVxfkuOGdRMg4NsAvauTXR/Lr/9vo9uc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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