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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2d9abdb1944f63d9e8078c3652e22b789985a36d7274b782b5af87279766518' 
  AND token = 'g5j6OOq2eFuEawNzJRVYypRVixTazv0d1Xzme7ct4x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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