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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63bc18a2374adfe791d04210a1a714481d12e067450a497e68e4a671b83e3c5e' 
  AND token = 'Svs+GyZ7gCf7oMI6hsqwbwEcumIA7NHm/dG//AbaJN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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