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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4da195ac44bf08868b4d004b6dc2fd53f8a2f7ea53256d861bee88b7cb322bf' 
  AND token = 'SVEOYwURBx6b7ll2hg94XpxlNEGDjM9e1xwpIWvLNPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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