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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9272b03206d4674cdde011b117951abaf5c469720a8efdc96f897d8dc2aaabc9' 
  AND token = 'GwVQ3hDavLTBPP92gHfH+Njv1+B+W6+Drm+S+Sw3OfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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