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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb7d95b6264364666ef85f03fab2433cd1e7116bfc93604c824b7a1be00ea860' 
  AND token = 'YJL3ZXIFCrE+jeqm5HPQCBsd4O0Nxi+NpI9fjEbaRt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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