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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dfa50ee8f8af69320dc7a4624c2a8b40ade9d9d1c04b07d661412ce31cf1f35' 
  AND token = 'Q45j38dMJzm5QJXeeWwcnR1Gy5iivHFl25YticiQTjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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