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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ec058a5ad322ca04017cf3af71daa500665d68cd4a560ef25d07a8bf442ab35' 
  AND token = 'NoTJxfwuF0G55j4eaNfRBYEk/NkDsjBVliZIllG9mwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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