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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd3d935693e7c2cd86b8c8dfc0a7b208ebcf8a62c35ed9c09c0b22233fc1f706' 
  AND token = 'tweiXC7TsfxcfEQA+yHJsI5VMRoJIltJ6wwzO3KRA7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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