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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13afedd102853bed1a6d59980447f9614594148402e43eec23a6c23524f02d53' 
  AND token = 'tbKlD/Mm/0cCdaIEP4TNSbeDb6NAYtwn+WXCYuNd04Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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