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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1c5375c272f6271fa3b420d0c5f5597f5250c75745fcb1e79f225a55a9d761a' 
  AND token = 'ri01G8p96WONlPb7p/y/eW0qjUMYfvCmvMoAn8w6f/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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