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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c478a4ef3953bdf4653a5dc3acbe31ef6b873f8b7751ca49077ea323b7c1d9a' 
  AND token = '0D631dMhrrrf9xXRslPbpT2DuWgHfgY2ysJM/mamj5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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