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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd979965a14ea75df0820e269ee3954deeca8330d80c240540528883d559d5c13' 
  AND token = 'Mfpuqu0PC7v9+ZtGDJLslw2I6+QdrLsTPCYLCWXIAo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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