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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58b458db9879d30cbd95c3b4557d480ebab966915c1de478093bc667156d3e07' 
  AND token = 'hXJxsChbqqb/S/mkV6VqyrhrG9A0e2im4o4V1aflWDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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