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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f195ced6e6b5cd625db2a58ab42f26a27260b2a192bddd544ee175e80c1d6e49' 
  AND token = 'xI9axPyCArvQmS25UstKX9Oi0DNtSeRGvP2v1vJ9dp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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