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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d4f8b9df3d0a0bf3c7ac34b634a444300288af43c4d9489dfd5c5dc01d6953d' 
  AND token = 'Ro6CBbqtRa8qUaNZMRdtB0WmVCfa+8xwPfFIFGfKHss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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