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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee9e6d7f933ddfbea1cc40c66e5a219bdc0a308ff3ff6a7b574c1fc789676efe' 
  AND token = '3XbIPhYo82DmRiQNBi1ihZVCPowWXWVeMZA2Uu1h/z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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