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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '47e7b5978719d080c17d4f0bf3523a3be2588f7e1f9bb9ed6faf1565e6eb44d5' 
  AND token = 'vQw2F/YCggCf+IaDY+vx9pX7HiCcSo1gbNYcpmSCaz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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