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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7e216fb6e327e78a08a63eb56d1dc4b758410e039eb20ecddab826adc0b8a4f' 
  AND token = '+yx2tPLBy+rsQutADy8KQHI75zhBjQcq5rOq71HZ4nI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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