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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e3e01dac58b4f11d495fba0a4e5ed222e32ea0fd101f77b6654c72f9bedfbd1' 
  AND token = 'ruQICTUMuLI4N7dS5y2XKKIWcyxQeGgx6waP5d4y+vA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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