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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd05b8fc3e7c6c59e1b156702de09be3d6a038f17e272f61f7949e523b4a5d2a' 
  AND token = '+Q7c7HvS7mVBbzo7YMtsObB2+zFqka8yZDpp6fajWoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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