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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a480def020c2604921e3d356405ca2931d62c16ef2cdba924eb26dfea9bf9eb8' 
  AND token = 'WTO+knUwtQij8zy9xqtuiNPFzBsg9mLberGCpZRGYI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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