Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0981270096b85dc80dd813fc71db0e8ca457f088c4b0fefb2718377564e25035' 
  AND token = 'U4g1H4o3E2NAZzoLAZcvqilM5kH7p0AJFsbz1kJG+MM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}