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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52d73a9932d3c9af95407205bd8dced2b0167a5a28e058f9c7cc27f6d71911ef' 
  AND token = 'i+f6ksSaWyaSaVj2a6zmEkw7n3j+T74RYa0Ruy/VC50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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