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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1627bcbb9900c799a8dc9d7a6f798f554425124f44cc37a95f2748240addba9f' 
  AND token = 'gCc4q0MaT8D6fThW/CumvvqhmJ1rSN/kcIYrYrpW5aI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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