Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b105f3b0c65ec910c4dc0f83e8c8f67e12e242147c94e52bdd6e0b0bca64e0a7' 
  AND token = 'Z2I09BcxIOFxpmTze9lHFo4kTxMY3VRhSLRJxIfmZY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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