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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '367884e75d1fa6cbe3db12dd88fa889ea07805beebc0f92727be0a6598eba60f' 
  AND token = 'lEAYn6NydIV2H3PZAVkX6MaOPt9pP/DOBdKy8i5Jjzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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