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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cc143a31f9501ecca117ff473692cc5250662df69e95de9765de463f6fe7569' 
  AND token = 'oD42jN1Pl+opp9PZBjAeQv32iGKCf51MyeaG9kNV2rE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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