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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7a4906e2a9f2480c41bd93b9fdd986be807c07491c7fc7dd9e86c82cd8ad9cb' 
  AND token = 'oM4POBoJxFFZ4ta0PfEtjP8ReC0GYz1bCm3pYklzG8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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