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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bee046fee31e2efb3ce0700106964114fa257af870dd7a5fa8945c118d1711b' 
  AND token = 'R7luuigVOljILyD85VLc5bfTLfZSGAsPkVDlWhQG6k4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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