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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cea9b4ab24d578a112b82ffa5f7e67d00009bc8aba69b5a1da6ef7cc391273b1' 
  AND token = '8oXGTAnhtjvuX9dZnQ/5l+TEcblBwscYn9amEEip/Ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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