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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58200200def43ba64ab9b950f6c43df779b56f34f2cd8fd2b722986b7f09b59a' 
  AND token = 'JewnaE8VSBMuExi1U0+VRSOzI5W9ZsAeHQhWl1ZrAfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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